On April 25th, 2009, Aladdin Lighting Network invited domestic authoritative experts to hold a rational call for the 2009 LED application product achievements and trends behind Shenzhen, to share high-level with LED lighting companies, designers and terminal owners. The wisdom of the results. The seminar was a lively discussion.
An on-site audience consulted the international OLED standard project leader, LED backlight source, member of the international standard of optical radiation safety expert group, and associate professor of the Department of Optoelectronic Information Engineering of Zhejiang University, with the contradiction between the brightness and illumination standard of LED street lamp design. This is the detailed content of the speech: 牟åŒå‡: LED future standard for energy saving and environmental protection (Figure)); Tsinghua University Shenzhen Graduate School of Electronic Physics and Laser Devices, Associate Researcher; Tsinghua University Shenzhen Graduate School of Semiconductor Lighting Laboratory Deputy Director Qian Keyuan (Click here to learn more about Qian Keyuan's speech: Qian Keyuan: LED street lights can be done but not easy (Figure))
Question: I would like to ask the money teacher and the teacher. We know that there is a brightness standard and illumination standard on the design of the street lamp. How should we consider this problem in the design? If I achieve uniform illumination, I may see the road surface. Will see bright spots.
牟åŒå‡ ( 牟åŒå‡é˜¿æ‹‰ä¸ç…§æ˜Žç½‘åšå®¢ >> ) : Just talked about the illuminance and brightness of the street lamp, the visual requirements from the human eye should be based on brightness, but a new problem is that the beam is now playing very big, now follow In terms of illuminance, when we hit the following, the lights below are definitely shadows, which is not good for the driver. We all know by car, cement road, we are far away, there is light shining, it is watery, not water, we look brighter, this is a contradiction, according to my personal point of view, brightness is comparison scientific. Of course, these two are definitely contradictions.
Qian Keyuan (Qian Keyuan Aladdin Lighting Network Blog >> ) : Just now, Mr. Yan said a lot, brightness and illumination are a contradiction on the street light, the street light is not diffuse, the second one is to the next sixty meters If it is rainy, the gods can't even achieve uniform brightness. The rainy water is the mirror. The driver is a point, and the brightness will never be uniform. Very good cement road, who made the lights shine very well, which one is very good. Shenzhen has a very good road with dozens of street lights. You will feel very even at night, but we know that some asphalt roads are hard to get on. It feels very uniform. In the distance, it is zebra strips, brightness. It has too much relationship with the reflection of the road surface. No matter how good the road is, it will not work. Consider this when designing the road. Don't make the zebra strip so obvious. When speaking, the brightness of the rectangle is not the same as the rectangle. It is a problem. How to cover the light type and uniformity in brightness. Of course, it is a good thing that your illumination is even. Finally, considering how good this road is, we have not dared to write this standard, so it has passed. The uniformity rate is not 100% or the best. It may take into account both. I think this problem is very deep, and it may be encountered when the street lamp is encountered.
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牟åŒå‡: LED future standards for energy saving and environmental protection (Figure... 2009-04-27
Yang Zhengming called for LED research and development to do some real work (Figure) 2009-04-27
Qian Keyuan: LED street lights can be done but not easy (Figure) 2009-04-27
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